variable step spring

[todaniele]

Good morning to all,

I have a question about the realization of variable step springs controlled by chart, that is, the function obtained through the "helicoidal sweep" control

I would like to know how to determine the number of edges through the chart that controls the spring step.

Thank you.

 

[Ghirarduzzi.G]

I can tell you how I did it, but I don't know if it was a case or if it actually always works.
In reality the number of coils is determined from the initial point and from the final point of the curve that manages the step.
that is to be understood if you have a 80-length spring and make a 20-long curve you will have 4 coils that however vary the step during the rotation according to the curve you gave him.
for example I had to make a helical surface to convey fluid in a hole (type a slide of those you see in the pools) and I needed half a lap (180°). my vertical variation was 20 mm. I built a 40 mm long curve so that the departure and arrival of the surface were flat and he did exactly half round leaving and arriving on the floor.
I hope I've been clear.
Bye!

 

[todaniele]

how much did you explain it through the sweep or helical sweep command?
Thank you.

 

[Ghirarduzzi.G]

sweep elicoidale. ..

 

[todaniele]

but have you adopted the variable step function defined by chart?

I am coming to the result that I wanted (I think, and hope)
all I need to parameterize it and make possible the construction of a spring by changing only the height, step and section values.

 

[Ghirarduzzi.G]

Yes yes! managed by chart.
Now I can't show you the pictures of how I made the chart because clearly there is the company network in cloths and so I can't access the file.
However the chart was built so that the departure and arrival were horizontal and tangent to the curve that regulates the step. In this way I imposed him a perfectly flat arrival and departure and a slope of the surface that first increased (until half) and then fell (until the end).
Obviously I imposed this thing only and the curve I made it simply with a spline, so managed by pro/e.
I was only interested in leaving and coming.

 

[maxopus]

the topic has already been dealt with in depth, use the search function.

 

[todaniele]

maxopus, I tried to search but I didn't find how useful it could be.
Excuse me.